Cement-free alkali-activated binding material, and mortar and concrete using same

Abstract

The present invention relates to a cement-free alkali-activated binder. More particularly, the present invention relates to a cement-free alkali-activated binder having a novel combination ratio, which can improve the compressive strength of mortar and concrete in which the cement-free alkali-activated binder is used as a binding material instead of cement, and which can solve the low field applicability of mortar and concrete in terms of quick setting characteristics, fluidity loss, economic efficiency and the like, and to mortar or concrete comprising the same. The cement-free alkali-activated binder can improve field applicability by controlling the content and combination ratio of an alkali activator included in the cement-free alkali-activated binder, and can solve the problems of the toxicity of cement, the carbon dioxide (CO 2 ) produced during the manufacturing of cement and the exhaustion of natural resources due to the production of cement.

1 . A cement-free alkali-activated binder, comprising:
 a source material selected from the group consisting of slag, fly ash, meta-kaolin, and a combination thereof; and   a complex alkali activator including an alkaline hydroxide and a carbonate.   
     
     
         2 . The cement-free alkali-activated binder of  claim 1 , wherein the source material is included in an amount of 88 to 96 wt %, and the complex alkali activator is included in an amount of 4 to 12 wt %, based on the total amount of the cement-free alkali-activated binder. 
     
     
         3 . The cement-free alkali-activated binder of  claim 1 , wherein a weight ratio of the alkaline hydroxide and the carbonate of the complex alkali activator is 2 to 4:4 to 6. 
     
     
         4 . The cement-free alkali-activated binder of  claim 1 , wherein the alkaline hydroxide is selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide, magnesium hydroxide, and barium hydroxide, and a combination thereof. 
     
     
         5 . The cement-free alkali-activated binder of  claim 1 , wherein the carbonate is selected from the group consisting of potassium carbonate, sodium carbonate, magnesium carbonate, barium carbonate, and a combination thereof. 
     
     
         6 . A cement-free mortar, comprising the cement-free alkali-activated binder of  claim 1 . 
     
     
         7 . The cement-free mortar of  claim 6 , further comprising sand, wherein the cement-free alkali-activated binder is mixed with the sand in a weight ratio of 1:2 to 3. 
     
     
         8 . A cement-free concrete, comprising the cement-free alkali-activated binder of  claim 1 . 
     
     
         9 . A cement-free concrete product, manufactured using the cement-free concrete of  claim 8 . 
     
     
         10 . The cement-free concrete product of  claim 9 , wherein the cement-free concrete product is selected from the group consisting of a brick, a block, a tile, a sewage pipe, a boundary stone, a concrete pile, prestressed concrete, a concrete panel, a concrete pipe, a manhole, a foamed concrete, a concrete structure, and a combination thereof. 
     
     
         11 . A cement-free mortar, comprising the cement-free alkali-activated binder of  claim 2 . 
     
     
         12 . A cement-free mortar, comprising the cement-free alkali-activated binder of  claim 3 . 
     
     
         13 . A cement-free mortar, comprising the cement-free alkali-activated binder of  claim 4 . 
     
     
         14 . A cement-free mortar, comprising the cement-free alkali-activated binder of  claim 5 . 
     
     
         15 . A cement-free concrete, comprising the cement-free alkali-activated binder of  claim 2 . 
     
     
         16 . A cement-free concrete, comprising the cement-free alkali-activated binder of  claim 3 . 
     
     
         17 . A cement-free concrete, comprising the cement-free alkali-activated binder of  claim 4 . 
     
     
         18 . A cement-free concrete, comprising the cement-free alkali-activated binder of  claim 5 . 
     
     
         19 . The cement-free alkali-activated binder of  claim 1 , wherein the source material includes slag, and the alkaline hydroxide includes sodium hydroxide, and the carbonate includes sodium carbonate. 
     
     
         20 . The cement-free alkali-activated binder of  claim 19 , wherein the slag is included in an amount of 88 to 96 wt %, the complex alkali activator is included in an amount of 4 to 12 wt %, based on the total amount of the cement-free alkali-activated binder, and a weight ratio of the sodium hydroxide and the sodium carbonate is 2 to 4:4 to 6.